Multicolor printing



STATS FELIX xtrnnnr AND EDWIN ACKER, or OFFENBACH-ON-THE-MAIN, GERMANY. ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE CHEMICAL FOUNDATION, me.

A CORPORATION OF DELAWARE.

rarer orrnc.

iv'mnrrconon PRINTING.

1 426,73 Specification of Letters Patent. Pafgnted A 15 1922 No Drawing. Application filed November 2, 1916. Serial No. 129,115.

To all whom it may concern Be it known that we, FELIX KUNERT and EDWIN AOKER, subjects of the German Emeror, residing at Offenbach-on-the-Main, ermany, have invented new and useful Improvements in Multicolor Printing (for which we have filed applications in Germany, Ser. No. 25,990, filed Feb. -12, 1916, No. 26,036, filed March 1, 1916; Holland, Ser. No. 7,049, filed June 23, 1916), of which the following is a specification.

Hitherto it has not been possible to use nitrosamine colours in multi-colour printing simultaneously with other dyestuffs, such as tannin dyestuffs or chrome dyestuffs, or with steam black, because the nitrosamine colours, that is to say mixtures of nitrosamines and naphthols, cannot stand even a short steaming, since such treatment either causes them to lose strength and fade, or changes their tint; red, for instance, changing towards brown.

The present invention is based onthe discovery that nitrosamine colours, to which have been added normal chromates or other metal salts, such as aluminium borate or sodium vanadate, which form with azo-dyestuffs lakes capable of resisting steam. are

satisfactorily fast to steam, so that by using such nitrosamine printing colours the dyestuff can be developed in tints of full strength and purity after steaming.

Such nitrosamine colours as contain normal chromates or the aforesaid salts may be steamed together with other colours, simultaneously printed, inlthe Mather-Flatt or other steaming apparatus, without exhibiting the aforesaid objection. This was not possible in the processes hitherto known.

Naphthols suitable for use 'in this invention are all oxynaphthalenes which are capable of acting as components of azo-dyestufis,

and, therefore, in addition to the naphthols themselves derivatives of them, such as arylides of oxynaphthoic acids, or hydrazides of these acids, aminonaphthols, acidyl-aminonaphthols or like bodies may be employed.

In specifications N os. 199143 and 205461 processes are described for reserving indigo by means of nitrosamine-fi-naphthol colours with the aid of chromates. These are cases in which .normal alkali chromate is added in addition to other chromates to nitrosamine colours but merely for the purpose, of reserving indigo, for a steaming process doesnot come into question.

The said specifications, therefore, in describing the use of normal chromates for the purpose of reserving indigo do not lead to the deduction that by using nitrosamine colours t0 W h1Ch normal chromates have been added, it is possible to develop the dyestuffs satisfactorily after steaming.

The present invention is an important techn cal advance for it provides many new combinations 1n printingand renders, it possible to print simultaneously with tannin dye- A modification of the invention consists in using the nitrosamine printing colours, so far as they contain chromate, in the indigo colour discharge. In this'case beautiful and fast discharge effects are obtained on goods dyed with indigo, when the nitrosamine colours are steamed after the printing, and thus for the first time it is possible to use nltrosamine colours for multi-colour discharge effects on indigo, because, for instance, in addition to discharge white and nltrosamine-red, yellow or other pigment colours, with albumin and chromate or other steam dyestuffs, can be produced.

A. Nitrosamine colours.

1 kilo. An orange-red is obtained.

EXAMPLE 2.

20' grams fi-naphthol.

20 grams caustic'soda lye of 34 Baume Specific gravity.

100 grams water. j

500 grams tragacanth th1cken1ng 1:20.

110 grams nitrosamine of'paramtro-orthoanisidine (containing 17 per cent of base).

50 grams normal sodium chromate.

I 200 grams water.

A turkey-red is obtained.

ExAMrLE 4.

20 grams di-2 3-oxynaphthoyl-para-phe nylenediamine.

30 grams caustic soda lye of 34 Ba'um specific gravity.

500 grams tragacanth thickening 1:20.

50 grams nitrosamine of dianisidine (co ntaining20 per cent of base).

.370 grams water.

30 grams iron chromate (liquid).- 20 grams normal potassium chromate.

1 kilo. A black-blue is obtained.

. EXAMPLE 5. 20 grams benzoyl-l:7-aminonaphthol, 25 grams caustic soda lye of 34 Baum specific gravity. 500 grams tragacanth thickening 1 :20.

75 grams nitrosamine of meta-nitro-paratoluidine (containing 16 per cent of base).

340 grams water;

40 grams normal potassium'chromate.

1 kilo. A brownish red is obtained.

B, Auxiliary colours.

20 grams chrome printing yellow 2 G N. 280 grams water.

600 grams starch tragaca'nth thickening. 100 grams chromium acetate of 20 Baum specific gravity.

1 hildg.

. Q v macaw 10 grams methylene blue G. 50 grams lactic acid.

5 grams tartaric acid. 275 grams water.

600 grams starch tragacanth thickening.-

grams tannin-acetic acid 1:1.

1 kilo.

0'. Developing bath. 30 grams acetic acid of 8 Baum specific .graviyf 50 grams laubers salt, crystallized. 20 grams antimony fluoride double salt made up to 1 litre. Application of the process on an indigo ground: On goods dyed with indigo blue is printed (a) Nc'trosamine colours.

1. 20 grams -[5-naphthol.

20 ccml caustic soda lye of 34 Baum specific gravity. 100 ccm. water. 500 grams thickening. 120 grams nitrosamine of para-nitroortho-anisidine (containing 17 per cent ofbase). 150 grams normal potassium chromate,

90 com. water,

.2. 22 grams 2:3-oxynaphthoic acid anilide. 20 com. caustic soda lye of 34 Baum specific gravity. 208 com. water. 500 grams thickening. 100 grams nitrosamine of meta-nitro-paratoluidine (containing 15 per cent of base). 150 grams normal potassium chromate.

(6) Auxiliary colours.

400 grams Grela yellow R as paste. 225 grams tragacanth thickening 1 :20. 120 grams sodium bichrom'ate.

20 com. ammonia.

35 com. water.

200 grams egg albumin in water 1:1.

.After drying, the oods are steamed for 3-5 minutes in the ather-Platt apparatus and then passed during 10 seconds through a hot discharge bath consisting of 50 grams oxalic acid and 200 com. hydrochloric acid of 20 Baum specific gravity in 1 litre,

and finally well washed.

We claim as our invention:

1. The process of -multi-color printing with mixtures of nitrosamines and ma hthols upon white goods, comprising printing on said goods with nitrosamine printing colors to which have been added metallic salts which form color lakes uninfluenced by steaming and subsequently developing in a bath containing an organic acid having two atoms of carbon in its molecule.

7 2. The process of multi-color printing with mixtures of nitrosamines and naph thols upon white goods, comp-rising printing on said goods with' nitrosamine printing colors to which have been added metallic salts, which form color lakes uninfluenced by steaming, drying steamin for Several minutes, and finally developing in a hot balth containing acetic acid, and a metallic sa t.

3. The process of 'multi-color printing with mixtures of nitrosamines and naphthols upon white goods, comprising printing on said goods with nitrosamine printing colors to which have been added normal chromates, which form color lakes uninfluenced by steaming, drying, steaming about five to ten minutes, and finally developing in a hot bath containing acetic acid and a metallic salt.

4:. The process of multi-color printing with mixtures of nitrosamines and naphthols upon white goods, comprising printing on said goods with a nitrosamine printing color composed of a derivative of an oxynaphthoic acid, caustic alkali, a thickening agent, a nitrosamine color, water and an aluminium compound, drying, steaming for several minutes, and finally developing in a hot baith containing acetic acid, and a metallic sa t. v

5. The process of multi-color printing with mixtures of nitrosamines and naphthols upon White' goods, which comp-rises printing on said goods with a nitrosamine printing color composed of 2.3 oxynaphthoic acid, caustic soda of 34 B. strength, tragacanth thickening, nitr'osamine of paranitraniline, water, and analuminium compound, drying, steaming for about five to ten minutes, and finally developing in a hot bath containing acetic acid and a metallic salt.

Frankfort-o-M. this 8th day of July FELIX KUNERT. EDWIN ACKER. 

